EP2100824B1 - Capsule avec contrôle de débit et élément de filtrage - Google Patents

Capsule avec contrôle de débit et élément de filtrage Download PDF

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Publication number
EP2100824B1
EP2100824B1 EP08152626A EP08152626A EP2100824B1 EP 2100824 B1 EP2100824 B1 EP 2100824B1 EP 08152626 A EP08152626 A EP 08152626A EP 08152626 A EP08152626 A EP 08152626A EP 2100824 B1 EP2100824 B1 EP 2100824B1
Authority
EP
European Patent Office
Prior art keywords
capsule
flow control
foil member
foil
porous member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP08152626A
Other languages
German (de)
English (en)
Other versions
EP2100824A1 (fr
Inventor
Paul Eichler
Peter Koch
Francisco Campiche
Pierre Monnier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nestec SA
Original Assignee
Nestec SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE602008006666T priority Critical patent/DE602008006666D1/de
Application filed by Nestec SA filed Critical Nestec SA
Priority to ES08152626T priority patent/ES2365642T3/es
Priority to EP08152626A priority patent/EP2100824B1/fr
Priority to PT08152626T priority patent/PT2100824E/pt
Priority to PL08152626T priority patent/PL2100824T3/pl
Priority to AT08152626T priority patent/ATE508074T1/de
Priority to CA2716580A priority patent/CA2716580C/fr
Priority to BRPI0909506-3A priority patent/BRPI0909506B1/pt
Priority to CN2009801084393A priority patent/CN101970314B/zh
Priority to EP09719931A priority patent/EP2265517A1/fr
Priority to RU2010141757/12A priority patent/RU2503604C2/ru
Priority to US12/922,255 priority patent/US8986762B2/en
Priority to PCT/EP2009/050034 priority patent/WO2009112291A1/fr
Priority to JP2010550100A priority patent/JP5519540B2/ja
Priority to AU2009224911A priority patent/AU2009224911B2/en
Priority to JP2011544002A priority patent/JP5800714B2/ja
Publication of EP2100824A1 publication Critical patent/EP2100824A1/fr
Priority to HK10101048.8A priority patent/HK1137401A1/xx
Application granted granted Critical
Publication of EP2100824B1 publication Critical patent/EP2100824B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/804—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package
    • B65D85/8043—Packages adapted to allow liquid to pass through the contents
    • B65D85/8055—Means for influencing the liquid flow inside the package
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/24—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure
    • A47J31/34—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure
    • A47J31/36—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure with mechanical pressure-producing means
    • A47J31/3666—Coffee-making apparatus in which hot water is passed through the filter under pressure, i.e. in which the coffee grounds are extracted under pressure with hot water under liquid pressure with mechanical pressure-producing means whereby the loading of the brewing chamber with the brewing material is performed by the user
    • A47J31/3676—Cartridges being employed
    • A47J31/369—Impermeable cartridges being employed
    • A47J31/3695—Cartridge perforating means for creating the hot water inlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/804—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package
    • B65D85/8043—Packages adapted to allow liquid to pass through the contents
    • B65D85/8061—Filters

Definitions

  • the present invention generally relates to capsules for containing beverage ingredients, to a beverage producing system for use in connection with such capsules as well as to methods for producing beverages on the basis of ingredients contained in such capsules.
  • the background of the present invention is the field of capsules which contain beverage or other comestible (e.g. soup) ingredients.
  • beverage or other comestibles e.g. soup
  • a beverage or other comestibles such as for example soups
  • the interaction can be for example an extraction, brewing, dissolution, etc. process.
  • Such a capsule is particularly adapted to contain ground coffee in order to produce a coffee beverage by having hot water under pressure enter the capsule and draining a coffee beverage from the capsule.
  • FR 1537031 does not show separated capsules, but a blister pack of containing coffee powder.
  • a filter is arranged at the bottom of each compartment and thus opposite of the area where the two foil members are sealed.
  • the outlet side of the compartment is opened by actively moving a perforation member, via a spring force, against the lower face of the compartment. Due to the blister pack technology the top face of the compartments has to be flat.
  • EP0507905B1 relates to an apparatus and cartridge for preparing a liquid product.
  • An internal filtering membrane is placed in the bottom of the cartridge for retaining the solid particles in the cartridge and prevent clogging of the flow channels provided in the perforating members.
  • EP-A-512468 relates to a capsule for the preparation of a beverage wherein a filter paper is welded between the peripheral area of the cup and the tearable membrane.
  • US 5, 242, 702 relates to an extraction of coffee using sealed cartridge comprising a bottom face which deforms and tears against a finger under a pressure of from 1 to 10 bar to enable extraction liquid to flow through the filter without tearing the filter.
  • US2006/0236871A1 relates to a single portion cartridge which is suitable in particular for brewing a portion of a coffee beverage wherein a distributing and/or supporting structure is provided with at least one opening which is covered by a textile fabric.
  • the essential object of this invention is to minimize the escape of particles of the beverage substance from the cartridge during the brewing operation because a large opening is made in the bottom of the capsule body and the particles would be washed out in absence of such distributing structure.
  • EP1654966 relates to a capsule with a sealing member comprising a foil member adapted to tear against a relief plate by forming a multitude of openings.
  • the capsule 200 as shown in Fig. 1 has a frustoconically-shaped cup which may be filled e.g. with roasted and ground coffee 300 and which is closed by a foil-like tear face cover 400 welded and/or crimped to a flange-like rim 140 which extends laterally from the side-wall of cup.
  • a capsule holder 130 comprises a flow grid 120 with relief surface element members.
  • the capsule holder 130 can be accommodated in a larger support 150 which has a lateral wall 240 and a beverage outlet 270 for the passage of extracted coffee beverage.
  • the extraction system further comprises a water injector 700 having water inlet channel(s) 201 and an annular element 800 with an internal recess of which the shape substantially corresponds to the outer shape of the capsule.
  • the annular member 800 comprises a spring 220 holding a ring 230 for releasing the capsule on completion of extraction.
  • a capsule 200 is placed on the capsule holder 130.
  • the water injector 700 perforates the upper face of the cup.
  • the lower tear face 400 of the capsule rests on the radially arranged members of the capsule holder 130.
  • the water is injected through the channel 201 of the water injector 700 and impinges on the bed 300 of coffee.
  • the pressure in the capsule increases and the tear face 400 increasingly follows the shape of the radial opening relief members.
  • Such radial opening relief members could be replaced by pyramid-shaped reliefs or other shapes of relief.
  • the tear face tears along the relief members.
  • the extracted coffee flows through the orifices of the flow grid 120 and is recovered in a container (not shown) beneath the beverage outlet 270.
  • the perforations in the second face especially when cooperating with the relief members, filter the beverage leaving the interior of the capsule so that non-soluble coffee particles remain in the capsule. It has been considered in the prior art that such filtering is sufficient (see e.g. column 4 of EP512470B1 ).
  • EP 512468B1 teaches to have a capsule with a flat perforable foil member for delivery of the coffee.
  • a filter paper can be sealed between the foil member and the rim of the base body.
  • the capsule, i.e., the membrane opens under the sole effect of the pressure in the capsule.
  • a filter is, at its rim portion, sandwiched between the foil member and the capsule base body wall.
  • the foil member is additionally provided with a weakened area and is not designed to be perforated by being thrust against a relief plate.
  • the invention has found that, according to the teaching of the prior art, when a sealed gastight capsule with a simple perforable foil member is placed against a capsule holder with a multitude of small reliefs, and in particular, small squared or rectangular perforation elements, one may have the following problems:
  • the invention relates to a capsule for use in a beverage production machine comprising:
  • the capsule is thus provided with a flow control and filtering member called "flow control porous member" in the rest of the description.
  • the flow control porous member is positioned between at least a portion of ingredients and the foil member.
  • the flow control porous member may be positioned between the ingredients and the plane defined by the ring-shaped sealing area between the foil member and the rim of the base body.
  • the base body of the capsule may comprise a rim onto which the foil member is sealed at an annular sealing area.
  • the rim of the base body may further extend outwardly by a curled end.
  • the base body and/or the foil member can be made from aluminum or aluminum alloy or a laminate of aluminium or aluminium alloy and polymer
  • the flow control porous member may be connected to the capsule in being sandwiched, in the sealed area, between the rim of the base body and the foil member.
  • the flow control porous member has preferably a higher rigidity in flexure than the foil member so that the member deforms less under pressure than the foil member against the relief elements.
  • a lower deformation (or a differential of deformation) provides space between the member and the foil member during extraction allowing the beverage, e.g., liquid coffee extract to better flow between the perforated openings and the relief elements. This results in a faster flow of the liquid through the foil member without affecting significantly the strength of the liquid extract (i.e., total solid content, yield).
  • a higher rigidity can be obtained by a porous member being thicker than the foil member and/or being made of more rigid material.
  • the flow control porous member thickness may be between 10 microns and 1.5 mm.
  • the flow control porous member thickness is between 200 microns and 1.0 mm.
  • the foil member of the capsule is configured to be successfully torn against a multitude of relief elements by a relief plate of the beverage production device.
  • the foil member must be designed to tear in a consistent manner, in particular, when a predetermined threshold of pressure in the capsule is reached. Therefore, the design of the foil member and the design of the relief plate of the device are determined in such a way that the opening/tearing of the foil member is reliably and consistently carried out.
  • the foil member has a thickness of between 15 and 45 microns. Most preferably, the foil member thickness is of about 30 microns plus or minus the typical manufacturing tolerances (e.g., +/- 5 microns). Furthermore, the foil member is preferably made of aluminium or aluminium alloy.
  • the ratio of flow control porous member thickness to the foil member thickness is comprised between 1.5:1.0 and 50:1, most preferably between 5:1 and 20:1.
  • the flow control porous member may be positioned in the capsule in a manner separate from the capsule walls, i.e., disconnected from the walls.
  • the flow control porous member may be loosely inserted between the ingredients and the foil member.
  • the flow control porous member may be connected to the walls of the base body of the capsule and/or to the foil member.
  • the flow control porous member can be connected to the wall by sealing or other connection modes such as mechanical engagement e.g., clipsing.
  • the porous member comprises essentially polymeric fibre-containing material.
  • the flow control porous member may be made from a non-woven material.
  • the flow control porous member may also be made from a woven material.
  • the porous member is preferably formed of food-grade meltable polymeric fibres.
  • the porous member comprises microfibres of diameter less than 20 microns.
  • the porous member comprises a melt blown (MB) microfibres-containing material.
  • the porous member can be selected within the group consisting of: polypropylene, polyethylene, PBT, Nylon, polycarbonate, poly(4-methyl pentene-1), polyurethane, PET, resin bonded-glass fibres and combinations thereof.
  • the porous member can also comprise fibres of a diameter higher than 20 microns.
  • blends of microfibres and larger diameter fibres can form the porous member.
  • a porous member can be formed of melt blown (MB) and/or spunbond (SB) material.
  • the flow control porous member may be a solid injected plastic plate with small flow control openings.
  • the flow control porous member has a porosity (i.e. average opening diameter) comprised between 0.45 and 100 microns. Particularly good results on flow time reduction were obtained with a flow control porous member with a porosity of between 0.45 and 25 microns. The porosity may be lower than 10 microns, even lower than 2 microns. Flow time reduction was also obtained with ground coffee having a particle size (D 4,3 ) comprised between 190 and 400 microns.
  • D 4,3 particle size
  • the flow control porous member may be, at its rim, sandwiched between the foil member and the capsule walls.
  • the flow control porous member may be distanced from the foil member.
  • the flow control porous member may transversally separate two portions of ingredients, in particular, two portions of ground coffee.
  • the two portions of ground coffee have different brewing characteristics.
  • the brewing properties may refer, in relation to each of said portions, to the mass, the volume, the tap density, the average particle size (D 4,3 ), the type of blend, the degree of roasting and combinations thereof.
  • the upstream portion of ground coffee portion comprises a mass of ground coffee which has a lower average particle size D4,3, than the downstream portion of ground coffee.
  • the upstream portion of ground coffee may be of a higher volume or smaller volume than the downstream portion.
  • the upstream portion of ground coffee portion comprises a mass of ground coffee which has a higher average particle size D4,3, than the downstream portion of ground coffee.
  • the upstream portion of ground coffee may be of a higher volume or smaller volume than the downstream portion.
  • the flow control porous member may be placed adjacent to the foil member in the capsule.
  • a small space may be allowed between the porous member and the foil member due to the deformation differential between the two elements. Indeed, due to its lower rigidity the foil member deforms more to a convex shape under the pressure of gas (e.g., carbon dioxide) inside the sealed capsule and a small gap may form between the foil member and the porous member.
  • gas e.g., carbon dioxide
  • the flow control porous member may be attached to the inner side of the foil member.
  • the flow control porous member may be welded to the inner surface of the foil member.
  • the porous member may be printed directly on the inner surface of the foil member.
  • the flow control porous member may be thicker than the foil member, preferably at least 1.5 times thicker than the foil member.
  • the flow control porous member may be flat or corrugated.
  • the flow control porous member may also comprise, for example, channels and/or protruding zones that promote a collection gap for the beverage between the foil member and the flow porous member.
  • the foil member may be free of weakened areas before being inserted in a beverage production machine.
  • the foil member may be a continuous sheet of metal or polymer or a laminate of metal and polymer.
  • the flow control porous member may be positioned and arranged such that it is not sandwiched between the foil member and the rim of the base body.
  • the flow control porous member may be placed loosely in the capsule or may be attached in a localized area onto the inner surface of the foil member and with the edge of the flow control porous member being at a distance from the sealing area of the foil member and base body.
  • the outer edge of the flow control porous member may end at a position radially inwards from the sealing area of the foil member and the rim of the base body.
  • Another aspect of the invention relates to a method using a capsule according to any of the aforementioned features.
  • the method is for producing a beverage on the basis of an ingredient in a capsule, the method comprising the steps of:
  • this additional member provides a faster and more consistent flow of the delivered beverage through the foil member.
  • the capsule contains a dose of between 5.5 to 6.5 grams of ground coffee.
  • a dose of between 5.5 and 6.0 grams is preferred.
  • a dose of between 6.0 and 6.5 grams of coffee is preferred.
  • a stronger lungo coffee can be obtained while maintaining an acceptable flow time, i.e., of less than about 40 seconds.
  • a capsule for a stronger lungo contains above 6.0 grams of ground coffee, preferably between 6.2 and 7.0 grams.
  • the capsule contains ground coffee having a particle size D 4,3 between 250 and 450 microns.
  • D 4 particle size
  • the flow time for delivering 40 mL of coffee extract is lower than 40 seconds.
  • the flow time for delivering 110 mL of coffee extract is lower than 40 seconds, more preferably lower than 30 seconds.
  • the flow control porous member has a porosity comprised between 0.45 and 100 microns, most preferably, between about 0.60 and 25 microns.
  • a flow control porous member which is a non-woven member with microfibres such as a melt blown (MB) filter web.
  • Remarkable results have also been obtained with a foil member having a thickness of 15 and 45 microns, e.g., about 30 microns.
  • the foil member is preferably in aluminium or aluminium alloy.
  • the fixed relief member of the beverage production device may comprise a tearing structure is preferably configured to produce a grid-like perforation of the foil member.
  • the fixed relief member of the beverage production device may comprise a tearing structure has exclusively tearing edges forming angles of at least 80 degrees.
  • the structure is free of sharp shape with angles formed of less than 80 degrees.
  • the tearing structure comprises shapes of truncated pyramids and recesses forming a network of beverage collecting channels; which structure forms, as a result of thrust of the foil member against the fixed relief member, partial rectangular or squared imprints forming small discrete tears in the foil member. It is observed that the foil member tends to intimately deform to tear against the structure whereas the flow control porous member remains less deformed against such a structure.
  • the structure is also such (with no sharp edges like needles) that the risk of rupture of the porous member is low and that the porous member can be thin enough while providing its flow control properties.
  • Another aspect of the invention relates to the combination of a capsule and a beverage production machine according to any of the aforementioned features.
  • total solids is defined as the weight of extracted solids contained in the extract divided by the total weight of the extract. This value is typically expressed in percentage.
  • extraction yield refers to the character of the extract and it is defined as the weight of total solids in the liquid extract divided by the total weight of starting coffee ingredients in the cartridge (e.g., roast and ground coffee). This value is typically expressed as a percentage.
  • the average particle size "D 4,3" represents the mean volumetric diameter of the coffee grind as obtained by laser diffraction method using a Malvern ® optical instrument and butanol as dispersing agent for the particles.
  • the "crema” is defined as the head of foam created on the coffee extract with a texture of substantially small bubbles.
  • the crema attribute can be measured by an empirical sugar test which consists in arranging a well defined crystal sugar layer (i.e., crystal sugar of D 4,3 of 660 microns of particle size) on top of a freshly prepared cup of coffee and measuring the elapsing time between the start of overlaying and the main part of sugar's sinking.
  • the "sugar test value” is thus a number of seconds.
  • the "pressure of liquid or liquid/gas mixture” is typically a measure of relative pressure above atmospheric pressure taken at the injection site in the capsule.
  • the pressure of liquid or liquid/gas mixture according to the process of the invention is of at least 4 bar for providing the tearing of the foil member during extraction, preferably of at least 6 bar, most preferably of at least 8 bar.
  • a capsule according to the present invention comprises at least two opposing wall members which are connected to each other at the edges to form a sealed flange-like rim area, thus enclosing a sealed interior.
  • this embodiment shows a capsule holder 13 having relief elements 12 which are designed to tear and perforate a foil member 5 closing off a cup-like base body 4 of the capsule 1.
  • This tearing of the foil member can e.g. occur as soon as the pressure inside the capsule exceeds a threshold value.
  • the relief elements can have any protruding shape able to cause a (partial) tearing of the foil member, preferably of grid-like design. As an example pyramids, bumps, cylinders, elongated ribs are cited as preferred examples.
  • ingredients 3 are contained, wherein the ingredients 3 are selected such that a beverage can be produced when having a liquid entering the capsule in the region of the top wall 17 of the capsule 1 and then interact which such ingredients 3.
  • Preferred ingredients are e.g. ground coffee, tea or any other ingredients from which a beverage or other liquid or viscous comestible (e.g. soup) can be produced.
  • Fig. 2 shows a state in which such a capsule has been placed on a capsule holder 13, the foil member 5 resting on the relief element 12 side of the capsule holder 13 and the cup-like base body 4 of the capsule 1 being already partly surrounded by the circumferential wall 25 of an enclosing member 9 of the beverage production device.
  • the shown enclosing member has the shape of a bell. Other shapes are viable, wherein the design of the interior contours (recess) of the enclosing member is generally adapted to substantially match the contours of the capsule 1.
  • the foil member 5 as shown may not be exactly flat due to a defined over pressure inside the capsule, which over pressure is generated by introducing e.g. a protective gas when producing the filled capsule and/or by gas being released by the ingredients contained in the capsule.
  • a protective gas when producing the filled capsule and/or by gas being released by the ingredients contained in the capsule.
  • gas such as carbon dioxide is released after closure of the capsule at the production site which results in the foil member being deformed to a slightly convex shape.
  • a flow control member 80 is placed between the ingredient 3 and the foil member 5.
  • the enclosing (bell) member 9 furthermore comprises a pressing surface 18 for applying a closure pressure on the rim area 8 of the capsule, an external thread 19 for mounting the bell member in a beverage production device and a water inlet opening 20 for feeding a liquid such as for example hot water under pressure to a water injector 14 which is releasably mounted (screwed) to the bell member 9.
  • connection means be it releasable or permanent connection means.
  • the other components of the beverage production device such as e.g. the mechanism for displacing the bell member and eventually also the capsule holder are known from the prior art in the field of capsule-based espresso machines.
  • the water injector comprises perforation element(s) (blade, pin, etc.) 24 designed to produce an opening in the top wall 17 of the capsule 1 when the capsule holder 13 and the bell member 9 are moved close together e.g. by a manually operated or an automatic mechanism.
  • a channel (not shown in the drawings) traverses the perforation element 14 such that water can be fed to the interior of the capsule 1 once the perforation element 14 protrudes into the interior of the capsule 1.
  • the capsule 1 comprises said top wall 17, a sidewall 7 and a flange-like rim 6, wherein the foil member 5 is sealed to said flange-like rim 6 to close-off hermetically the cup-like base body 4 of the capsule 1.
  • the foil member 5 is sealed to said flange-like rim 6 to close-off hermetically the cup-like base body 4 of the capsule 1.
  • other designs for the capsule are possible as long as the capsule can be sealed and contain the mentioned ingredients.
  • Fig. 3 shows a capsule 1 where the aluminum or aluminium alloy foil member 5 before it is sealed onto the base body 4, and the flow control porous member 80 inserted between the bed 3 of ingredient and the foil 5.
  • the flow control porous member 80 is an example of a filtering web made out of a non-woven material. It is preferably made of polymer such as polypropylene, polyethylene, PBT, Nylon, polycarbonate, poly(4-methyl pentene-1), polyurethane, PET or any other meltable fibrous polymers. Its porosity may range of from 0.45 to 100 microns, more precisely of from 0.45 to 30 microns, more precisely of from 0.45 to 20 microns, even more precisely between 0.45 and 10 microns, even more precisely between 0.45 and 2 microns.
  • the filter disk can be reinforced, e.g. by a non-woven or woven material such as polyester.
  • Fig. 4 shows a flow control porous member 81 which has been cut into the proper dimensions and which can then be sealed, together with the aluminum foil member, e.g. via ultrasonic welding, to the flange-like rim 6 of the capsule 1. Since the porous member is made of meltable polymer(s), its welding to the capsule is so made possible. Preferably the flow control porous member dimensions are such that the edge of the flow control porous member overlap the flange-like rim 6 of base body 4 of the capsule 1.
  • Fig. 5 shows the example of a flow control porous member 82 which has been cut into the proper dimensions, preferably slightly smaller diameter "D0" than the inner diameter "D" of the base body of the capsule. Therefore the edges of the flow control porous member do not reach to the walls of the capsule and the flow control porous member is then simply placed on the ingredients already filled in the capsule beforehand. Finally the foil member 5 is attached, for example heat or ultrasonically sealed, to the flange-like rim 6 of the capsule 1.
  • Fig. 6 and 7 illustrate the filtering' effect of the present invention.
  • the invention is particularly adapted to a grid-shaped perforation 205 of the foil member 5 of the capsule, wherein the grid is comprised by small essentially rectangular or squared imprints defining a plurality of perforations of the foil member obtained as a result of the brewing process.
  • the perforation is provided by the relief elements 12 ( Figures 2 or 17 ) onto which the foil member extends and tears under the effect of the internal pressure during extraction.
  • the tearing structure is formed of surfaces which are free of sharp angles or edges, i.e., angles of less than about 80 degrees.
  • Figure 6 shows that there is resurgence of coffee particles through the perforation 205 in absence of the flow control member.
  • Figure 7 shows a significant improvement with no resurgence at all of solids with capsules of the invention.
  • figures 8 and 9 show also a neater perforation 205 for the capsule of the invention.
  • the perforations seem to be more consistent and of a more well defined profile.
  • FIG 8 one can notice perforations of different size and depth.
  • the internal flow control porous member means according to the invention are particularly effective and suited in combination with an aluminium or aluminium alloy foil member 5 to be perforated in such a grid-like structure and with small openings 205.
  • the pressure drop during extraction under pressure of the coffee in the capsule is caused in the piping of the coffee machine, in the coffee bed, but primarily across the interface of the foil member and the puncture plate, i.e., the tearing structure.
  • the resulting time required to extract a certain amount of liquid depends therefore on the phenomena happening between the foil member and the puncture plate (i.e., "pyramid plate”).
  • the inventors think that the pressure drop occurring at the membrane-pyramid plate interface is mainly determined by the width of the gap between the membrane and "pyramid plate". The width of this gap is established at the beginning of extraction, particularly during the phase when the membrane ruptures. Very dynamic and to some extent chaotic phenomena can happen at this moment.
  • Membrane physical strength e.g. tensile strength, puncture resistance, elongation before rupture
  • rupture pressure and hydrodynamic behaviour of the water influence on how intense the membrane will be pressed against the pyramid plate and thus the gap width.
  • the flow control porous member is not sandwiched between the foil member 5 and the rim 6 of the base body 4.
  • the outer edge of the flow control porous member may end at a position radially inwards from the sealing area 209 of the foil member 5 and the rim of the base body.
  • Fig. 14 and 15 show that the internal flow control porous member means 206 can be distanced from the foil member 5.
  • the flow control porous member 206 are respectively sealed to the walls 7 of the base body of the capsule.
  • the flow control porous member can thus separate transversally with respect of the brewing direction two portions of ingredients, e.g., two ground coffee portions.
  • the flow control porous member can thus regulate the flow of liquid between the two portions.
  • the portions of ingredient may have different characteristics such as a different granulometry or be different coffee blends.
  • the reference sign 207 designates the curled outer rim of the capsule.
  • the foil member 5 and the rim flange of the base body can be sealed together in a ring-shaped area 209 inside and adjacent to the curled outer rim 207.
  • Figure 16 illustrates another possible mode for a capsule of the system of the invention.
  • the capsule comprises a cup-like base body 4, a closing foil 5 and a flange-like rim 6 of the body onto which is sealed an annular part of the closing foil.
  • a flow control porous member 301 is placed in the capsule and is spaced from the inner surface of the foil member by a spacing element 302.
  • the spacing element can be a grid with large holes or rigid member with channels and through holes providing significantly no pressure drop.
  • the relief elements of the capsule holder 13 are designed such that no angles of the relief element is below 80 degrees that could form sharp edges.
  • the capsule holder 13 comprises a tearing structure 92 comprising a series of truncated pyramids 920 having substantially squared sections.
  • the upper surface of the pyramids is basically a square surface 921 of smaller section than the base section 922 of the pyramids.
  • the square surfaces 921 form the "plateau" of the tearing structure.
  • the pyramid can comprise a lower base 923 of larger section than the base section 922.
  • the number of pyramids can range of from about 25 to 50.
  • the height of the pyramids can be of from about 0.5 to 3 mm.
  • the tearing edges of the structure are mainly situated at the edge 924 of the upper surface 921 and at the edges 925 of the side walls of the pyramid. All the surfaces of the pyramids connect at the tearing edges by forming angles of more than 80 degrees. More preferably the upper tearing edges 924 are delimited by surfaces forming an angle of more than 90 degrees.
  • Figure 10 shows comparative curves of the coffee cup concentration as a function of the flow time (in seconds) for delivery of 40 mL of coffee extract, for respectively capsules without flow control porous member and capsules according to the invention with a flow control porous member.
  • the curves show the results on the standard deviation of flow times for different granulometries, respectively, 195, 267, 279 and 399 microns (Coffee ground in a Probat grinder).
  • the capsule contained 5.5 grams of ground coffee and a porous member made of a microfibre-containing web, "Innovatec SAP489" (Specific weight of 50g/m2), made of polyurethane.
  • the porous member of a diameter of about 33 mm was placed adjacent the foil member.
  • the foil member of the capsule had a thickness of 30 microns.
  • the capsules were extracted in a "Nespresso Concept®" machine.
  • Figures 11 and 12 show a comparative evolution of the flow time as a function of the particle size D(4,3) for delivering a lungo coffee extract of 110 grams from capsules containing about 6 grams of coffee and having a foil member of about 30 microns.
  • the porous member of a diameter of about 33 mm was placed adjacent the foil member.
  • the flow time is significantly reduced below 30 seconds for particle size in the range of from 289 to 403 microns (More particularly, for respectively 289, 318, 347, 375 and 403 microns).
  • the flow time standard deviation is significantly decreased to less than 5 seconds for all particles sizes.
  • the capsules were extracted in a "Nespresso Concept®" machine.
  • Figure 13 shows the results on the results on crema formation using capsules of the invention and comparatively capsules with no flow control porous member.
  • the curves are comparative curves of the "crema” (time in seconds for "sugar test") as a function of the flow time for delivering 110 grams of coffee extract in seconds.
  • the capsule contained 6 grams of ground coffee and a porous member made of microfibrous "Innovatec SAP489" web in polyurethane.
  • the foil member had a thickness of 30 microns. The results clearly show that the flow control porous member does not affect the crema formation whereas the flow time is significantly reduced.
  • crema is measured according to an empirical test called "sugar test”. The procedure for this test is explained below.
  • Example 4 Flow time for long coffee (110 grams) and higher mass of ground coffee (6.2 grams):
  • a comparative test was run for capsules with or without flow control member made of a web of nylon 6,6, "Ultipor N66 Posydine" from PALL Company of 0.65 microns and 33 mm of diameter.
  • the capsules contained 6.2 grams of ground coffee having particle size D 4 , 3 of 320 microns.
  • the porous member of a diameter of about 33 mm was placed adjacent the foil member.
  • the flow time was comprised between 33 and 37 seconds with an average flow time of 34 seconds.
  • the coffee yield was measured between about 22 and 23%.
  • capsules of the same characteristics but without flow control porous member exhibited a flow time between 24 and 72 seconds with an average flow time of 49 seconds.
  • the following table provides results on flow time for different other porous member tested.
  • the reference was a capsule with no porous member inside. This result shows that the flow time is improved for porous membrane of between 0.45 to 100 microns.
  • the coffee yield was comprised between about 22 and 23%.
  • the mechanised sugar test device is composed of a small sugar-containing silo.
  • the prismatic V-shape of this silo comprising a defined slit (2mm x 40mm) at the bottom edge can create a uniform sugar curtain as long as the slit is free and a minimum of sugar remains in the silo.
  • This silo can be moved horizontally, with controlled speed ( ⁇ 40 mm/s) from one point "A" to a point "B" (distance between A and B is 20 cm). In the end position at both points a baffle prevents the sugar from flowing out if the device is in stand-by mode. When the silo is moved, the sugar curtain is produced all the way between the two points "A" and "B".
  • the crema in a cup that is placed at 60 mm below this path within the two points will be topped with a uniform layer of sugar when the silo passes over it.
  • the chronograph is started when the sugar layer is positioned on the foam's layer.
  • the amount of sugar (a thickness of the layer to obtain a precise weight of 5 g of sugar) deposed in the cup is adjustable by varying the speed of the silo or the dimensions of the slit.
  • the sugar is crystal sugar of D 4,3 equal to 660 microns.
  • a precise waiting period (20 sec. for small cups) must be observed between the end of extraction and the start of the sugar test.
  • the sugar layer remains some time on top of the crema. Later, when the main part of the sugar sinks suddenly the observing operator must stop the chronograph.
  • the "sugar test value" is the number of seconds shown by the chronograph. Additional information as to this test can be found in EP1842468B1 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Apparatus For Making Beverages (AREA)
  • External Artificial Organs (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Tea And Coffee (AREA)
  • Packages (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Burglar Alarm Systems (AREA)
  • Water Treatment By Sorption (AREA)
  • Filtration Of Liquid (AREA)

Claims (31)

  1. Une capsule pour utilisation dans une machine de production de boisson comprenant:
    - des moyens pour perforer un côté d'entrée du corps tronconique de la capsule (1) opposé à l'élément sous forme de film (5) et au rebord similaire à une collerette, et pour injecter un liquide ou un mélange liquide/gaz dans la capsule (1),
    - une plaque en relief avec une multitude d'éléments en relief, laquelle plaque en relief est agencée dans la machine de sorte que la pression d'injection pousse l'élément sous forme de film (5) contre la plaque en relief, la capsule (1) comprenant :
    - un corps de base tronconique (4) étanchéifié par un élément sous forme de film (5) attaché de manière serrée au rebord (6), similaire à une collerette, du corps de base (4), l'élément sous forme de film (5) étant fabriqué à partir d'un matériau qui est ensuite perforé par la plaque en relief pour former une multitude d'ouvertures lorsque la pression du liquide et du mélange liquide/gaz injectés atteint une valeur d'au moins 4 bar, la capsule comprenant en outre un élément poreux de contrôle d'écoulement (201, 203, 204, 206, 208) agencé entre au moins une portion d'ingrédients dans la capsule (1) et l'élément sous forme de film (5), l'élément poreux de contrôle d'écoulement de la capsule ayant une taille de pore comprise entre 0,45 et 100 microns et l'élément sous forme de film (5) ayant une épaisseur entre 15 et 45 microns.
  2. Capsule selon la revendication 1,
    dans laquelle l'élément poreux de contrôle d'écoulement a une taille de pore comprise entre 0,45 et 25 microns.
  3. Capsule selon la revendication 2,
    dans laquelle l'élément poreux (201, 203, 204, 206, 208) comprend essentiellement du matériau polymérique contenant des fibres.
  4. Capsule selon la revendication 3,
    dans laquelle l'élément poreux (201, 203, 204, 206, 208) est fabriqué à partir d'un matériau tissé et/ou non-tissé.
  5. Capsule selon la revendication 4,
    dans laquelle les fibres sont choisies parmi la liste de : polypropylène, polyéthylène, PBT, nylon, polycarbonate, poly(4-méthyle pentène-1), polyuréthane, PET, fibres de verre liées par une résine et combinaisons de ceux-ci.
  6. Capsule selon l'une des revendications précédentes, dans laquelle la capsule contient du café moulu ayant une taille de particule (D4,3) comprise entre 190 et 400 microns.
  7. Capsule selon l'une des revendications précédentes, dans laquelle l'élément poreux de contrôle d'écoulement (201, 203, 204, 206, 208) a une rigidité en flexion supérieure à l'élément sous forme de film.
  8. Capsule selon l'une des revendications précédentes, dans laquelle l'élément poreux de contrôle d'écoulement (201, 203, 204, 206, 208) est adjacent à l'élément sous forme de film.
  9. Capsule selon la revendication 8,
    dans laquelle le rebord (6), similaire à une collerette, du corps de base (4) et l'élément sous forme de film (5) sont étanchéifiés ou scellés dans une zone annulaire (209).
  10. Capsule selon la revendication 8,
    dans laquelle l'élément poreux de contrôle d'écoulement (201, 203, 204, 206, 208) est intercalé, dans la zone étanchéifiée (209), entre le rebord (6), similaire à une collerette, du corps de base (4) et l'élément sous forme de film (5).
  11. Capsule selon l'une des revendications 1 à 7, dans laquelle l'élément poreux de contrôle d'écoulement (201, 203, 204, 206, 208) est distant de l'élément sous forme de film (5).
  12. Capsule selon la revendication 11,
    dans laquelle un élément d'espacement (302) est inséré entre l'élément poreux de contrôle d'écoulement (301) et l'élément sous forme de film (5).
  13. Capsule selon la revendication 11,
    dans laquelle l'élément poreux de contrôle d'écoulement (201, 202, 203, 204, 206, 208) est scellé sur les parois latérales du corps de base (4) de la capsule (1).
  14. Capsule selon l'une des revendications 1 à 7, dans laquelle l'élément poreux de contrôle d'écoulement (201, 203, 204, 206, 208) est libre de connexion par rapport au corps et à l'élément sous forme de film.
  15. Capsule selon la revendication 14,
    dans laquelle l'élément poreux de contrôle d'écoulement (201, 203, 204, 206, 208) est inséré sans serrage entre les ingrédients (3) et l'élément sous forme de film (5).
  16. Capsule selon l'une des revendications 14 ou 15, dans laquelle le bord extérieur de l'élément poreux de contrôle d'écoulement (201, 203, 204, 206, 208) s'arrête en une position radialement à l'intérieur de la zone d'étanchéification (209) de l'élément sous forme de film (5) et du rebord (6), similaire à une collerette, du corps de base (4).
  17. Capsule selon l'une des revendications précédentes, dans laquelle l'élément poreux de contrôle d'écoulement comprend des microfibres de diamètre inférieur à 20 microns.
  18. Capsule selon l'une des revendications précédentes, dans laquelle le corps de base (4) est fabriqué à partir d'aluminium, alliage d'aluminium ou plaqué d'aluminium ou d'alliage d'aluminium et polymères.
  19. Capsule selon l'une des revendications précédentes, dans laquelle l'élément sous forme de film est fabriqué à partir d'aluminium, alliage d'aluminium ou plaqué d'aluminium ou d'alliage d'aluminium et polymères.
  20. Un procédé pour produire une boisson à partir d'un ingrédient dans une capsule, le procédé comprenant les étapes consistant à :
    - fournir une capsule (1) selon l'une des revendications 1 à 19,
    - insérer la capsule scellée (1) dans une machine de production de boisson,
    - perforer un côté d'entrée de la capsule (1) opposé à l'élément sous forme de film (5),
    - injecter un liquide ou un mélange liquide/gaz dans la capsule, provoquant l'établissement d'une pression dans la capsule et conduisant l'élément sous forme de film (5) à pousser contre un élément fixe en relief de la machine de production de boisson, l'élément sous forme de film (5) étant fabriqué à partir d'un matériau qui est ensuite perforé pour former une multitude d'ouvertures lorsque la pression du liquide et du mélange liquide/gaz injectés atteint une valeur d'au moins 4 bar,
    - drainer une boisson depuis la capsule, la boisson passant entre la multitude d'ouvertures et l'élément en relief, comprenant l'étape consistant à :
    - filter (201, 203, 204, 206, 208) la boisson via un élément poreux de contrôle d'écoulement (201, 203, 204, 206, 208) agencé entre au moins une portion d'ingrédients et l'élément sous forme de film (5).
  21. Procédé selon la revendication 20,
    dans lequel la capsule contient une dose comprise entre 5,5 et 7,0 grammes de café moulu.
  22. Procédé selon les revendications 20 ou 21, dans lequel le café moulu a une taille de particule D4,3 comprise entre 250 et 450 microns.
  23. Procédé selon l'une des revendications 20 à 22, dans lequel le temps d'écoulement pour distribuer 40 mL d'extrait de café est inférieur à 40 secondes.
  24. Procédé selon l'une des revendications 20 à 22, dans lequel le temps d'écoulement pour distribuer 110 mL d'extrait de café est inférieur à 40 secondes.
  25. Procédé selon la revendication 24,
    dans lequel le temps d'écoulement pour distribuer 110 mL d'extrait de café est inférieur à 30 secondes.
  26. Procédé selon l'une des revendications 20 à 25, dans laquelle l'élément poreux comprend des fibres non-tissées et/ou tissées.
  27. Procédé selon la revendication 26,
    dans laquelle les fibres sont choisies parmi la liste de : polypropylène, polyéthylène, PBT, nylon, polycarbonate, poly(4-méthyle pentène-1), polyuréthane, PET, fibres de verre liées par une résine et combinaisons de ceux-ci.
  28. Procédé selon l'une des revendications 20 à 27, dans laquelle l'élément sous forme de film est fabriqué à partir d'aluminium ou d'alliage d'aluminium.
  29. Procédé selon l'une des revendications 20 à 28, dans laquelle l'élément fixe en relief comprend une structure de déchirement configurée pour réaliser une perforation, similaire à une grille, de l'élément sous forme de film.
  30. Procédé selon la revendication 29,
    dans laquelle l'élément fixe en relief du dispositif de production de boisson comprend une structure de déchirement qui est exempte de forme pointue ayant des angles de moins de 80 degrés.
  31. Procédé selon la revendication 30,
    dans lequel l'élément fixe en relief du dispositif de production de boisson comprend une structure ayant la forme de pyramides tronquées et de renfoncements formant un réseau de canaux de collecte de boisson; laquelle structure forme, comme résultat de la poussée de l'élément sous forme de film (5) contre l'élément fixe en relief, des empreintes rectangulaires ou carrées partielles formant de petites déchirures discrètes dans l'élément sous forme de film.
EP08152626A 2008-03-12 2008-03-12 Capsule avec contrôle de débit et élément de filtrage Active EP2100824B1 (fr)

Priority Applications (17)

Application Number Priority Date Filing Date Title
ES08152626T ES2365642T3 (es) 2008-03-12 2008-03-12 Cápsula con control del flujo y elemento de filtro.
EP08152626A EP2100824B1 (fr) 2008-03-12 2008-03-12 Capsule avec contrôle de débit et élément de filtrage
PT08152626T PT2100824E (pt) 2008-03-12 2008-03-12 Cápsula com elemento de controlo de escoamento e filtragem
PL08152626T PL2100824T3 (pl) 2008-03-12 2008-03-12 Kapsułka z kontrolą przepływu i członem filtrującym
AT08152626T ATE508074T1 (de) 2008-03-12 2008-03-12 Kapsel mit flussregulierung und filterelement
DE602008006666T DE602008006666D1 (de) 2008-03-12 2008-03-12 Kapsel mit Flussregulierung und Filterelement
JP2010550100A JP5519540B2 (ja) 2008-03-12 2009-01-05 流通制御部材とろ過部材とを備えるカプセル
CN2009801084393A CN101970314B (zh) 2008-03-12 2009-01-05 带流动控制和过滤部件的胶囊
CA2716580A CA2716580C (fr) 2008-03-12 2009-01-05 Capsule a filtre regulateur de flux
RU2010141757/12A RU2503604C2 (ru) 2008-03-12 2009-01-05 Капсула с регулирующим потоком и фильтрующим элементом
US12/922,255 US8986762B2 (en) 2008-03-12 2009-01-05 Capsule with flow control and filtering member
PCT/EP2009/050034 WO2009112291A1 (fr) 2008-03-12 2009-01-05 Capsule à filtre régulateur de flux
BRPI0909506-3A BRPI0909506B1 (pt) 2008-03-12 2009-01-05 Cápsula com componente de controle de fluxo e filtragem e método para a produção de uma bebida
AU2009224911A AU2009224911B2 (en) 2008-03-12 2009-01-05 Capsule with flow control and filtering member
EP09719931A EP2265517A1 (fr) 2008-03-12 2009-01-05 Capsule à filtre régulateur de flux
JP2011544002A JP5800714B2 (ja) 2008-03-12 2009-09-14 流れ調整および濾過部材を伴うカプセル
HK10101048.8A HK1137401A1 (en) 2008-03-12 2010-01-29 Capsule with flow control and filtering member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08152626A EP2100824B1 (fr) 2008-03-12 2008-03-12 Capsule avec contrôle de débit et élément de filtrage

Publications (2)

Publication Number Publication Date
EP2100824A1 EP2100824A1 (fr) 2009-09-16
EP2100824B1 true EP2100824B1 (fr) 2011-05-04

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EP08152626A Active EP2100824B1 (fr) 2008-03-12 2008-03-12 Capsule avec contrôle de débit et élément de filtrage
EP09719931A Withdrawn EP2265517A1 (fr) 2008-03-12 2009-01-05 Capsule à filtre régulateur de flux

Family Applications After (1)

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EP09719931A Withdrawn EP2265517A1 (fr) 2008-03-12 2009-01-05 Capsule à filtre régulateur de flux

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US (1) US8986762B2 (fr)
EP (2) EP2100824B1 (fr)
JP (2) JP5519540B2 (fr)
CN (1) CN101970314B (fr)
AT (1) ATE508074T1 (fr)
AU (1) AU2009224911B2 (fr)
BR (1) BRPI0909506B1 (fr)
CA (1) CA2716580C (fr)
DE (1) DE602008006666D1 (fr)
ES (1) ES2365642T3 (fr)
HK (1) HK1137401A1 (fr)
PL (1) PL2100824T3 (fr)
PT (1) PT2100824E (fr)
RU (1) RU2503604C2 (fr)
WO (1) WO2009112291A1 (fr)

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NL2016779B1 (en) 2016-05-13 2017-11-16 Douwe Egberts Bv A capsule and a system for preparing a potable beverage from such a capsule
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RU2754461C1 (ru) 2016-11-09 2021-09-02 Пепсико, Инк. Устройства, способы и системы для приготовления газированных напитков
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US9877495B2 (en) 2015-01-09 2018-01-30 Starbucks Corporation Method of making a sweetened soluble beverage product
US10820607B2 (en) 2015-01-09 2020-11-03 Starbucks Corporation Soluble beverages with enhanced flavors and aromas
EP3322651B1 (fr) 2015-07-13 2019-07-03 K-fee System GmbH Élément filtrant comprenant un évidement

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BRPI0909506A2 (pt) 2015-12-22
US8986762B2 (en) 2015-03-24
PL2100824T3 (pl) 2011-10-31
CN101970314A (zh) 2011-02-09
AU2009224911B2 (en) 2014-05-29
CN101970314B (zh) 2013-08-14
ATE508074T1 (de) 2011-05-15
EP2265517A1 (fr) 2010-12-29
EP2100824A1 (fr) 2009-09-16
JP2011517551A (ja) 2011-06-16
BRPI0909506B1 (pt) 2019-04-02
CA2716580A1 (fr) 2009-09-17
RU2010141757A (ru) 2012-04-20
ES2365642T3 (es) 2011-10-07
AU2009224911A1 (en) 2009-09-17
WO2009112291A1 (fr) 2009-09-17
JP5800714B2 (ja) 2015-10-28
CA2716580C (fr) 2016-04-26
RU2503604C2 (ru) 2014-01-10
JP5519540B2 (ja) 2014-06-11
DE602008006666D1 (de) 2011-06-16
HK1137401A1 (en) 2010-07-30
US20110020500A1 (en) 2011-01-27
PT2100824E (pt) 2011-07-27

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